In 2005, Indiana passed legislation which took effect on April 2, 2006, that placed the entire state on daylight saving time (see. While most of the North America observes DST, there are significant exceptions. It can be licensed for commercial and government use, contact us at the email address above for details.
So be warned. Some political boundaries are complex, with conflicting sources of data and possible ongoing disputes. The time zone boundaries and DST observance are regulated by the Department of Transportation.
Clicking on any map opens it in full resolution, suitable for printing.
For most purposes, UTC is considered interchangeable with GMT, but GMT is no longer precisely defined by the scientific community. From east to west they are Atlantic Standard Time (AST), Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), Pacific Standard Time (PST), Alaskan Standard Time (AKST), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC-11) and Chamorro Standard Time (UTC+10). Zones used in states beyond the contiguous U.S. We include local exceptions to time zone observance, including Daylight Saving time rules.
The clocks run by these services are kept synchronized with each other as well as with those of other international timekeeping organizations. §260 and exist in waters defined by nautical time. Official chages in US time zone borders were made as recently as November 2010. In 1960, the International Radio Consultative Committee formalized the concept of Coordinated Universal Time (UTC), which became the new international civil time standard.
The United States uses nine standard time zones. All Rights Reserved. Wherever there is a difference between official time zone data, and local time zone observance, we try to show both. [1], Weather service chief Cleveland Abbe introduced four standard time zones for his weather stations, an idea which he offered to the railroads. We track all such changes and make sure we are current.
[5] UTC does not observe daylight saving time. OnTimeZone.com data is limited to North America, including time zone data for the United States, Canada, Mexico, Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and Panama. Data and images are all available via the "Files/Downloads" button on the left navigation bar. In practice, military crews may simply use Zulu time (UTC±00:00) when on these islands. ALERT: The buttons below require javascript to function properly. Daylight saving time (DST) begins on the second Sunday of March and ends on the first Sunday of November. Other outlying islands include Jarvis Island, Midway Atoll, Palmyra Atoll, and Kingman Reef (UTC−11:00); Johnston Atoll (UTC−10:00); and Navassa Island, Bajo Nuevo Bank, and Serranilla Bank (UTC−05:00). This page was last edited on 22 October 2020, at 18:43. Wherever there is a difference between official time zone data, and local time …
[8] Prior to this they were based upon the mean solar time at several meridians 15° apart west of Greenwich (GMT). Content may not be published elsewhere or used for any commercial or governmental purpose without explicit written permission. The portions of Indiana that were on central time observed daylight saving time.
From east to west they are Atlantic Standard Time (AST), Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), Pacific Standard Time (PST), Alaskan Standard Time (AKST), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC-11) and Chamorro Standard Time (UTC+10).
[3][4], In October 1884, the International Meridian Conference at Washington, D.C. adopted a proposal which stated that the prime meridian for longitude and timekeeping should be one that passes through the centre of the transit instrument at the Greenwich Observatory in the United Kingdom (UK). UTC is one of several closely related successors to GMT. Map of U.S. time zones since November 2007. DO NOT ASSUME ONTIME ZONE BORDERS REFLECT POLITICAL BOUNDARIES. The United States and its surrounding areas use nine standard time zones. Standard time zones in the United States and other regions are currently defined at the federal level by law 15 USC §260.
In our change log you will see that we keep very current with any changes to North American time zone borders and observance.
Time in the United States, by law, is divided into nine standard time zones covering the states, territories and other US possessions, with most of the United States observing daylight saving time (DST) for approximately the spring , summer, and fall months. OTZ boundaries seek only to show the likely time at a given location, not to indicate anything about the local legal or political authority. We track all such changes and make sure we are current. All rights to content from OnTimeZone.com (files, data, artwork, webpages) are reserved. Originally this ran from the last Sunday in April until the last Sunday in October.
For example, the border between its Eastern and Central time zones ran through Detroit, Buffalo, Pittsburgh, Atlanta, and Charleston. It is the combination of the time zone and daylight saving rules, along with the timekeeping services, which determines the legal civil time for any U.S. location at any moment. Before the adoption of four standard time zones for the continental United States, many towns and cities set their clocks to noon when the sun passed their local meridian, pre-corrected for the equation of time on the date of observation, to form local mean solar time. Details in the "exceptions" page.
The conference therefore established the Greenwich Meridian as the prime meridian and Greenwich Mean Time (GMT) as the world's time standard.
Four standard time zones for the continental United States were introduced at noon on November 18, 1883, in Chicago, IL, when the telegraph lines transmitted time signals to all major cities.
USA: Central Standard Time (CST) - Alabama, Arkansas, (western strip of) Florida, (some southwestern and northwestern counties of) Illinois, Iowa, (most part of) Kansas, Kentucky, Louisiana, Minnesota, Mississippi, Missouri, Oklahoma, (eastern) Nebraska, (north- and southeast of) North Dakota, (eastern part of) South Dakota, (western) Tennessee, Texas, Wisconsin
Every city in the United States used a different time standard so there were more than 300 local sun times to choose from. The borders presented here includes recent changes in Indiana, North Dakota and Nayarit Mexico. Official and highly precise timekeeping services (clocks) are provided by two federal agencies: the National Institute of Standards and Technology (NIST) (an agency of the Department of Commerce); and the United States Naval Observatory (USNO). OnTimeZone.com provides North American time zone data for use in GPS, routing and mapping programs. The time zone boundaries and DST observance are regulated by the Department of Transportation. Exceptions may exist in certain municipalities. The use of local solar time became increasingly awkward as railways and telecommunications improved. [7] As of August 9, 2007, the standard time zones are defined in terms of hourly offsets from UTC. Though donations are welcome and appreciated, the contents of OnTimeZone.com are unrestricted for any private, non-commercial use.
(More on that in our "exceptions" page).
These are the times zones that are used by the United States and its territories: UTC-11: Samoa Standard Time ; UTC-10: Hawaii-Aleutian Standard Time ; UTC-9: Alaska Standard Time ; UTC−8: Pacific Standard Time ; UTC−7: Mountain Standard Time ; UTC−6: Central Standard Time ; UTC−5: Eastern Standard Time
(Described from north to south along each boundary.). We intend to keep the data current. Each train station set its own clock making it difficult to coordinate train schedules and confusing passengers.
The borders of its time zones ran through railroad stations, often in major cities. [1] American railroads maintained many different time zones during the late 1800s.
[6] The federal law also establishes the transition dates and times at which daylight saving time occurs, if observed. The U.S. time-zone system grew from this, in which all zones referred back to GMT on the prime meridian.[1]. This is especially true of many Native American lands. Railroad managers tried to address the problem by establishing 100 railroad time zones, but this was only a partial solution to the problem.
View Current Times in All United States Cities and Towns, Time Zone Look Up by State with Current Local Times, WE RESPECT YOUR PRIVACY. Therefore the contents of this site are not suitable for any use involving risk to health, finances or property.
Hopefully this all helps get you where you need to go on time.
But it is not possible to guarantee 100% accuracy. The United States uses nine standard time zones.
© 2010-2020 Steve Jones. This can be used in Garmin Basecamp, Garmin Mapsource, Google Maps, Google Earth Microsoft Streets and Trips, and any other software that accepts standard map data.
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